Green’s Dictionary of Slang

party adj.

(US teen) hedonistic.

[US]E. Torres Carlito’s Way 29: Rocco and Earl was businessmen, while-as I was a jive-ass party man.
[US]J. Ellroy Silent Terror 103: ‘Stevie and Jill were party people. The like to get high and boogie’.
[US]D. Waters Heathers [film script] HM: Do they even have Thanksgiving in Africa? VS: Oh sure, pilgrims, Indians, tater-tots – it’s a real party continent.
[US]W.T. Vollmann Royal Family 543: San Francisco and Oakland, they’re real party towns, huh?
Party Europe 344: Nice, the craziest party town in the French Riviera.
A.A. Khachadoorian Inside the Eagle’s Head 77: Another student [...] summarized the ‘party school’ dilemma succinctly: Drinking becomes more of a motivation than the pursuit of academic goals.

In compounds

party hands (n.)

unwanted ‘wandering’ male hands, usu. experienced in a party environment.

[UK]G. Dent Independent (London) 30 May 🌐 As of yet, Aung San Suu Kyi isn't meeting Bill ‘Don't call me party hands’ Clinton, Bill ‘Butter him up for cash’ Gates or any of the international ‘unelected force-for-good brigade’.
Popbitch 14 Jan. 🌐 Handy Andy [...] FYI: [Prince] Andrew’s nickname on the trip (out of earshot) was Mr Tickle. Apparently everyone was pleased to escape his ‘party hands’.
[UK]J. Meades Empty Wigs (t/s) 536: Dr Orlov stroked her arse with his party hands. She giggled and wiggled.